Highly Efficient Organic Light-Emitting Diodes with Phosphorescent Emitters Having High Quantum Yield and Horizontal Orientation of Transition Dipole Moments

被引：327

作者：

Kim, Kwon-Hyeon ^{[1
,2
]}

Moon, Chang-Ki ^{[3
,4
]}

Lee, Jeong-Hwan ^{[1
,2
]}

Kim, Sei-Yong ^{[3
,4
]}

Kim, Jang-Joo ^{[1
,2
,3
,4
]}

机构：

[1] Seoul Natl Univ, WCU Hybrid Mat Program, Dept Mat Sci & Engn, Seoul 151744, South Korea

[2] Seoul Natl Univ, Ctr Organ Light Emitting Diode, Seoul 151744, South Korea

[3] Seoul Natl Univ, Dept Mat Sci & Engn, Seoul 151742, South Korea

[4] Seoul Natl Univ, Ctr OLED, Seoul 151742, South Korea

来源：

ADVANCED MATERIALS | 2014年 / 26卷 / 23期

关键词：

EMISSION;

D O I：

10.1002/adma.201305733

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Ancillary ligands in heteroleptic iridium complexes significantly influence the orientation of the transition dipole moments. Ir(ppy)(3), a homoleptic iridium complex, exhibits isotropic dipole orientation, whereas the heteroleptic Ir complexes of Ir(ppy)(2)tmd show a highly preferred dipole orientation (78%) in the horizontal direction. In addition, we demonstrate an unprecedented highly efficient green OLED exhibiting an EQE of 32.3% and a power efficiency of 142.5 lm/W by using an emitter with high quantum yield and horizontally oriented dipoles.

引用

页码：3844 / 3847

页数：4

共 14 条

[1]

[Anonymous], J APPL PHYS

[2]

Chance R. R., 1978, ADV CHEM PHYS, P37

[3] Oriented phosphorescent emitters boost OLED efficiency [J].

Flaemmich, Michael ;

Frischeisen, Joerg ;

Setz, Daniel S. ;

Michaelis, Dirk ;

Krummacher, Benjamin C. ;

Schmidt, Tobias D. ;

Bruetting, Wolfgang ;

Danz, Norbert .

ORGANIC ELECTRONICS, 2011, 12 (10) :1663-1668

[4] Determination of molecular dipole orientation in doped fluorescent organic thin films by photoluminescence measurements [J].

Frischeisen, Joerg ;

Yokoyama, Daisuke ;

Adachi, Chihaya ;

Bruetting, Wolfgang .

APPLIED PHYSICS LETTERS, 2010, 96 (07)

[5] Chlorinated Indium Tin Oxide Electrodes with High Work Function for Organic Device Compatibility [J].

Helander, M. G. ;

Wang, Z. B. ;

Qiu, J. ;

Greiner, M. T. ;

Puzzo, D. P. ;

Liu, Z. W. ;

Lu, Z. H. .

SCIENCE, 2011, 332 (6032) :944-947

[6] Intermolecular interaction and a concentration-quenching mechanism of phosphorescent Ir(III) complexes in a solid film [J].

Kawamura, Y ;

Brooks, J ;

Brown, JJ ;

Sasabe, H ;

Adachi, C .

PHYSICAL REVIEW LETTERS, 2006, 96 (01)

[7] Organic Light-Emitting Diodes with 30% External Quantum Efficiency Based on a Horizontally Oriented Emitter [J].

Kim, Sei-Yong ;

Jeong, Won-Ik ;

Mayr, Christian ;

Park, Young-Seo ;

Kim, Kwon-Hyeon ;

Lee, Jeong-Hwan ;

Moon, Chang-Ki ;

Bruetting, Wolfgang ;

Kim, Jang-Joo .

ADVANCED FUNCTIONAL MATERIALS, 2013, 23 (31) :3896-3900

[8] Highly phosphorescent bis-cyclometalated iridium complexes: Synthesis, photophysical characterization, and use in organic light emitting diodes [J].

Lamansky, S ;

Djurovich, P ;

Murphy, D ;

Abdel-Razzaq, F ;

Lee, HE ;

Adachi, C ;

Burrows, PE ;

Forrest, SR ;

Thompson, ME .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2001, 123 (18) :4304-4312

[9] Low Roll-Off and High Efficiency Orange Organic Light Emitting Diodes with Controlled Co-Doping of Green and Red Phosphorescent Dopants in an Exciplex Forming Co-Host [J].

Lee, Sunghun ;

Kim, Kwon-Hyeon ;

Limbach, Daniel ;

Park, Young-Seo ;

Kim, Jang-Joo .

ADVANCED FUNCTIONAL MATERIALS, 2013, 23 (33) :4105-4110

[10] Comparing the emissive dipole orientation of two similar phosphorescent green emitter molecules in highly efficient organic light-emitting diodes [J].

Liehm, Philipp ;

Murawski, Caroline ;

Furno, Mauro ;

Luessem, Bjoern ;

Leo, Karl ;

Gather, Malte C. .

APPLIED PHYSICS LETTERS, 2012, 101 (25)

← 1 2 →